How can I make an Ext JS grid with a column of check boxes that toggle each row as editable?

How can I make an Ext JS grid with a column of check boxes that toggle
each row as editable?

I am trying to create a grid with a column of check boxes that toggle
whether or not each row is editable. As of yet, I have not found a way to
make more than one row editable by any means. I like the idea of using the
CheckboxModel for selection as described here, but I could not get the
edit part to work and I want to edit the entire row.